This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A097408 #10 Feb 16 2025 08:32:54
%S A097408 1,1,8,2,6,1,2,4,6,1,1,2,2,3,5,6,8,1,1,1,1,2,2,3,3,4,5,6,7,8,9,1,1,1,
%T A097408 1,1,1,2,2,2,2,3,3,3,4,4,4,5,5,6,6,7,7,8,9,9,1,1,1,1,1,1,1,1,1,1,2,2,
%U A097408 2,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5,5,5,5,6,6,6,7,7,7,8,8,8,9,9,1,1,1,1,1,1
%N A097408 Initial decimal digit of n^4.
%H A097408 Alois P. Heinz, <a href="/A097408/b097408.txt">Table of n, a(n) for n = 1..10000</a>
%H A097408 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GelfandsQuestion.html">Gelfand's Question</a>
%e A097408 1, 16, 81, 256, 625, 1296, 2401, 4096, 6561, 10000, ...
%p A097408 a:= n-> parse(""||(n^4)[1]):
%p A097408 seq(a(n), n=1..120); # _Alois P. Heinz_, Jan 28 2016
%Y A097408 Cf. A000027, A002993, A002994, A097409, A097410, A097411, A097412, A097413, A097414.
%K A097408 nonn,base,easy
%O A097408 1,3
%A A097408 _Eric W. Weisstein_, Aug 16 2004